1. 
[syn: flatly, categorically, unconditionally]
The Collaborative International Dictionary of English v.0.48:
Flatly \Flat"ly\, adv.
   1. In a flat manner; evenly; horizontally; without spirit;
      dully; frigidly.
      [1913 Webster]
            He that does the works of religion slowly, flatly,
            and without appetite.                 --Jer. Taylor.
      [1913 Webster]
   2. peremptorily; positively; plainly; forthrightly. "He
      flatly refused his aid." --Sir P. Sidney.
      [1913 Webster]
WordNet (r) 3.0 (2006):
flatly
    adv 1: in an unqualified manner; "he flatly denied the charges"
           [syn: flatly, categorically, unconditionally]